A wind controller, sometimes referred to as a wind synthesizer, is an electronic wind instrument and usually in the form of a MIDI controller associated with one or more music synthesizers. Wind controllers are most commonly played and fingered like a woodwind instrument, usually the saxophone, with the next most common being brass fingering, particularly the trumpet. Models have been produced that play and finger like other acoustic instruments such as the recorder or the tin whistle. One form of wind controller, the hardware-based variety, uses electronic sensors to convert fingering, breath pressure, bite pressure, finger pressure, and other gesture or action information into control signals that affect musical sounds. Another form of wind controller uses software to convert the acousti